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Speed up mode search depending on relative ref frame position

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This commit enables the encoder to record the location of the
center frame to generate alter reference frame. It then allows to
skip checking prediction modes of other reference frame types when
it comes to encode this frame.

The speed 3 runtime is reduced for the test sequences:
bus at CIF 1000 kbps, 9791 ms -> 9446 ms, i.e., 3.5% speed-up,
pedestrian at 1080p 2000 kbps, 184043 ms -> 175730 ms, i.e., 4.5%
speed-up.

No compression performance change observed.

Change-Id: Iacfde3bcc1445964e7a241f239bd6ea11cb94bd1
This commit is contained in:
Jingning Han 2014-08-18 10:42:23 -07:00
parent 43a83a2734
commit 6a464eca05
3 changed files with 17 additions and 6 deletions
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19
vp9/encoder/vp9_rdopt.c
View File

@ -2632,6 +2632,12 @@ int64_t vp9_rd_pick_inter_mode_sb(VP9_COMP *cpi, MACROBLOCK *x,
int64_t total_sse = INT64_MAX;
int early_term = 0;
this_mode = vp9_mode_order[mode_index].mode;
ref_frame = vp9_mode_order[mode_index].ref_frame[0];
if (ref_frame != INTRA_FRAME && !(inter_mode_mask & (1 << this_mode)))
continue;
second_ref_frame = vp9_mode_order[mode_index].ref_frame[1];
// Look at the reference frame of the best mode so far and set the
// skip mask to look at a subset of the remaining modes.
if (mode_index == mode_skip_start && best_mode_index >= 0) {
@ -2653,6 +2659,13 @@ int64_t vp9_rd_pick_inter_mode_sb(VP9_COMP *cpi, MACROBLOCK *x,
break;
}
}
if (cpi->sf.alt_ref_search_fp && cpi->rc.is_src_frame_alt_ref) {
mode_skip_mask = 0;
if (!(ref_frame == ALTREF_FRAME && second_ref_frame == NONE))
continue;
}
if (mode_skip_mask & (1 << mode_index))
continue;
@ -2661,12 +2674,6 @@ int64_t vp9_rd_pick_inter_mode_sb(VP9_COMP *cpi, MACROBLOCK *x,
rd_thresh_freq_fact[mode_index]))
continue;
this_mode = vp9_mode_order[mode_index].mode;
ref_frame = vp9_mode_order[mode_index].ref_frame[0];
if (ref_frame != INTRA_FRAME && !(inter_mode_mask & (1 << this_mode)))
continue;
second_ref_frame = vp9_mode_order[mode_index].ref_frame[1];
if (cpi->sf.motion_field_mode_search) {
const int mi_width = MIN(num_8x8_blocks_wide_lookup[bsize],
tile->mi_col_end - mi_col);

2
vp9/encoder/vp9_speed_features.c
View File

@ -119,6 +119,7 @@ static void set_good_speed_feature(VP9_COMP *cpi, VP9_COMMON *cm,
sf->adaptive_pred_interp_filter = 0;
sf->cb_partition_search = frame_is_boosted(cpi) ? 0 : 1;
sf->cb_pred_filter_search = 1;
sf->alt_ref_search_fp = 1;
sf->motion_field_mode_search = frame_is_boosted(cpi) ? 0 : 1;
sf->lf_motion_threshold = LOW_MOTION_THRESHOLD;
sf->last_partitioning_redo_frequency = 3;
@ -347,6 +348,7 @@ void vp9_set_speed_features(VP9_COMP *cpi) {
sf->cb_pred_filter_search = 0;
sf->cb_partition_search = 0;
sf->motion_field_mode_search = 0;
sf->alt_ref_search_fp = 0;
sf->use_quant_fp = 0;
sf->reference_masking = 0;
sf->partition_search_type = SEARCH_PARTITION;

2
vp9/encoder/vp9_speed_features.h
View File

@ -291,6 +291,8 @@ typedef struct SPEED_FEATURES {
int motion_field_mode_search;
int alt_ref_search_fp;
// Fast quantization process path
int use_quant_fp;